package course;

import java.io.IOException;
import java.io.PrintWriter;
import course.method;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class back
 */
@WebServlet("/back")
public class back extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public back() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		response.getWriter().append("Served at: ").append(request.getContextPath());
		 PrintWriter out=response.getWriter();
		 String isbn = request.getParameter("number"); 
			 out.print(isbn); 
		 method.Connection("DELETE FROM bookselect WHERE ISBN= "+'"'+isbn+'"'); 
		 method.Connection("UPDATE booklist SET store=store+1 WHERE ISBN="+'"'+isbn+'"'); 
			 response.sendRedirect("index.jsp"); 
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}

}
